OFDMA 상향 링크에서 채널 품질 표시기 및 응답 채널 복조의 하드웨어 설계 구조
- 7782966 (2010.08.24)
- A base station demodulator according to the exemplary embodiment of the present invention includes a vector index demodulator, and a channel value detector. The vector index demodulator demodulates CQI or ARQ ACK/NACK channels by multiplying QPSK modulation signals transmitted as m subcarriers in a tile by m conjugate complexes corresponding to the m subcarriers, and determines the greatest value of the demodulation results as a vector index. The channel value detector inputs n vector indexes demodulated by the vector index demodulator to a first shift register, inputs n subsequent vector indexes to a second shift register, and detects a channel value for the CQI or the ARQ ACK/NACK by repeating the above vector index input to the first and second shift registers m-times.
- KSP 제안 키워드
- Frequency division, Frequency division multiple access(FDMA), Orthogonal Frequency Division Multiple Access(OFDMA), QPSK modulation, Shift Register, base station(BS), multiple access